<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
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<script>
    let promise = new Promise((resolve,reject) =>{
        let obj = {username:'我是狗东'}
        if(false){
            resolve(obj);
        } else {
            reject('我不是狗东，我是他爹');
        }
    })
    // promise.then(function (res){
    //     console.log(res.username);
    // }, function(erro){
    //     console.log(erro);
    // }
    // )
    promise.then((res) =>{
        console.log(res.username);
    },erro =>{
        console.log(erro);
    }
    )
</script>